boost/iostreams/detail/enable_if_stream.hpp

   1 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
   2 // (C) Copyright 2003-2007 Jonathan Turkanis
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
   5
   6 // See http://www.boost.org/libs/iostreams for documentation.
   7
   8 #ifndef BOOST_IOSTREAMS_DETAIL_ENABLE_IF_STREAM_HPP_INCLUDED
   9 #define BOOST_IOSTREAMS_DETAIL_ENABLE_IF_STREAM_HPP_INCLUDED
  10
  11 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
  12 # pragma once
  13 #endif
  14
  15 #include <boost/config.hpp>                // BOOST_NO_SFINAE.
  16 #include <boost/utility/enable_if.hpp>
  17 #include <boost/iostreams/traits_fwd.hpp>  // is_std_io.
  18
  19 #if !defined(BOOST_NO_SFINAE) && \
  20     !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592))
  21 # define BOOST_IOSTREAMS_ENABLE_IF_STREAM(T) \
  22     , typename boost::enable_if< boost::iostreams::is_std_io<T> >::type* = 0 \
  23     /**/
  24 # define BOOST_IOSTREAMS_DISABLE_IF_STREAM(T) \
  25     , typename boost::disable_if< boost::iostreams::is_std_io<T> >::type* = 0 \
  26     /**/
  27 #else
  28 # define BOOST_IOSTREAMS_ENABLE_IF_STREAM(T)
  29 # define BOOST_IOSTREAMS_DISABLE_IF_STREAM(T)
  30 #endif
  31
  32 #endif // #ifndef BOOST_IOSTREAMS_DETAIL_ENABLE_IF_STREAM_HPP_INCLUDED